Electromagnet.



C. R. MOORE.

ELECTROMAGNET.

APPLICATION FILED IIIIIY 24. 1913.

1,155502. Patented 001;. 5, 1915.

#QQ L v UNTED Stearns PATENT ernten.

CHARLES EP. MOORE, 0F LA FAYETTE, INDIANA.

ELECTROMAGNET.

Application filed May 24, 1913.

To all whom it may concern:

Be it known that l. Citernes li. Moore, citizen of the United States. residing at lia Fayette. in the county of Tippecanoe and State of Indiana. have invented a certain 'new and useful Improvement in Electromagnets, of which the following is a full, clear. concise, and exact description.; reference being had to the accompanying' drawings, forming a part of this specification.

My invention relates to electro-magnets and has a number of objects and advantages in View.

In practising certain l'eatures oi my invention the electro-magnet has two magnetic circuit portions included in different magnetic circuits and a single armature presented to both magnetic circuit portions. Each magnetic circuit portion preferably has two poles connected thereby, the armature being presented to the four poles ot said magnetic circuit portions. rllhe electromagnet is energized by a winding common to the two magnetic circuit portions of the magnet, this winding being preferably disposed in a single coil surrounding adjacent portions of the two magnetic circuits. Such a magnet may be well employed to control a circuit in which event the magnetic circuit portions are desirably insulated from each other and the circuit to be controlled may well include the armature and one of the magnetic circuit portions brought into electrical connection with the armature when moved. toward the magnet upon its energization The magnet of my invention has been satisfactorily employed as a circuit controller for including a circuit load in circuit 'with the generator when proper generator Voltage has been impressed upon the circuit, the winding of the magnet in such a use thereof being in bridge of portions o the load circuit conductors that are connected with the generator independently of the load, the armature of the magnet being in serial relation with the load and generator and operating to include the load in circuit with the 0enerator when the generator voltage has risen suiiiciently to afford suiiicient ampere turns in the winding of the magnet to attract the magnet armature. The generator may be in the form of a power driven dynamo-electric machine or in other form such as a storage battery. ln the case of a storage battery the circuit to the load is opened when the battery has been Specification of Letters Patent.

Patented Oct. 5S., 191 5. serial No. 769,755.

stitutes a back stop for the armature to limit4 its retracting movement whereby an especially provided back stop is not required.

l will explain my invention fully by reference to the accompanying drawing showing the preterred embodiment thereof and in which- Figure l is a sectional plan view on line .l l of Fig. 2; F ig. 2 is a sectional elevation on line 2 2 of Fig. 1.; Fig. 3 is a perspective view with the cover removed; and Fig. t is a diagrammatic view or" one circuit environnient in which the electro-magnet is ineluded.

liilze parts are indicated by similar characters of reference throughout the difterent figures. v

The magnet includes two magnetic circuit portions n, 7) which are insulated from each other. for the specific purpose herein disclosed. but to which separation of these por: tions l do' not wish to be limited. Each of the magnet circuit portions a, b is desirably iJ-shap'ed so that each portion will present two-poles to a single armature c which is attached at one end by means of a phosphor bronze spring (Z to an outer pole of the magnetic circuit portion l), the armature overlying ally oi the poles and carrying a contact c at its free end adapted for engagement with the contact j when the armature is attracted upon onergization of the magnet. lWhen the magnet is to be employed for cutting in a load upon the atiainment of the proper generator voltage, the electromagnet winding g, which is preferably in the form ot' a single coil surrounding the adjacent limbs o't the U-shaped cores, is normally in bridge of the conductors 71, and a' by means of which the generator c may be included in'circuit with an active load Z, such electric lamps or in circuit with a storage battery m if the generator is adapted to and may be employed for the charging of, such battery.

The armature c constitutes a switch which is serially included in the conductor h, and

by means of the invention, as it is preferably practised, the conductor L may directly include the left hand magnetic circuit portion a; as Well as the right hand magnetic circuit portion b, in which latter event the spring l is mounted so as to be in electrical connection not only with the armature c but also with the magnet circuit portion b. When the voltage of the generator 1c has suiciently risen the ampere turns furnished to the magnet With the aid of the pressure winding g have become sufficient Ato attract the armature c whereupon a circuit is established traceable from the generator le, the right hand portion of the conductor 7L, the magnetic circuit portion b, the spring d, the armature c, thecontacts e and f, the magnetic circuit portion ci, the left hand portion of the conductor it, thence to the generator c by way of the conductor i and either or both load portions Z, m according to the adjustment of the switches n and o, under the assumption that either or both of these load portions would receive current from the generator. When the voltage is sufficiently reduced the load is eX- cluded. Binding post p serves to connect the right hand end of coil g, the magnetic circuit portion Z), the armature c, permanently with one pole of the generator is. The binding post q serves to connect the other terminal of. the coil g with thel other pole of the generator c. The binding post r serves 'to connect the magnetic circuit portion a and the contact f With the lefthand section of the conductor It. The armature c preferably does not have a usual form of back stop, the cover s inclosing the magnet structure and its armature and having its top in such position with respect to the armature as to be engaged by the armature to limit its retractive movement, the coverA s thus itself performing the function of a `baclr stop for the armature in addition to that of a cover or casing.

its lower portion is in 'tight fit with an upvvardly projecting flange of the base t made of insulating material and upon which the entire magnet structure is mounted.

Hitherto a circuit controller employing a single magnetic circuit could have portions The cover atl thereof included in the controlled circuit providing the magnetic circuit were separated into electrically distinct sections that Would occasion the introduction of undesirable reluctance in such single magnetic circuit. I am able to avoid such undesirable reluctance without sacrificing the advantages in the constructions of the prior art, though the invention is not to be limited to a device through Whose magnetic circuit portions a controlled circuit may be established since, by means of the construction set forth, the energizing winding will operate-` satisfactorily on a number of ampere turns very considerably less than the ampere turns hitherto effective in devices of the prior art.

While I have herein shown and particularly described the preferred embodiment of my invention I do not Wish to be limited to the precise details of construction shown as changes may readily be made 'without departing from the spirit of my invention, but- Having thus described my invention I claim as new and desire to secure by Letters Patent the following z- A regulable electric circuit including a source of current and a circuit supplied thereby; in combination with an electromagnet having two electrically separated magnetic circuit portions included in different magnetic circuits and each having two poles connected thereby, said electromagnet having a single armature presented to the four poles thereof andniountcd upon one magnetic circuit portion and free to be moved toward and have contact with the other magnetic circuit portion, the coil of said magnet being supplied with current from said source while the circuit supplied by said source includes one of said magnetic circuit portions, the armature, and the other magnetic circuit portion, at which latter 'portion the circuit is made and broken by the movement of the armature.

In Witness whereof, I hereunto subscribe my name this 17 day of May A.. D., 1913.

CHARLES Il.. MOORE. Viitnosses: Y I

B. McCoNNrLL T. H. ANDREW. 

